San Diego is a city that has something for everyone–whether you’re looking to relax on a beach or enjoy some museums, you can do it all. And one of the best things is that there are activities to fit any budget. There are plenty of free and cheap things to do in San Diego. Here are my favorite budget-friendly activities for your next San Diego vacation. Make sure you check out this complete 5-day travel itinerary for your next San Diego trip as well. Go to the Beach San Diego is known for its beaches, and that is perhaps the cheapest thing you can do in San Diego. In fact,…